GT i-drive 2.0 Build
- Thread starter GCinDC
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GCinDC
100 MW
Easier said than done with my plugs... I'd have to make a new discharge plug. Might be a good use for it though... And since I rarely leave discharge plug in, that solves problem of draining the pack. (knock, knock). Also, the cops would probably love it!Hyena said:
My shunt had been set at 2mohms, but I knew that Amps were reading too high. That was okay, since I was really using less than I thought. But for judging the heat generated at what current, I needed more accuracy. While I do have a Turnigy Watt Meter on order, I thought I'd at least use the RC charger method, so here are some results...Kepler said:
(note: the icharger put back 4x the values, because i was charging 4p, so I divided by 4 to show Ah charged per 10Ah pack...)
I'd mistakenly reset the shunt the wrong way (1.8), and freaked out for a minute when I rode it!
Set to 2.2, it's pretty accurate. It will be interesting to see how accurate this is once the watt meter arrives...
One thing that was always different, when I did this before, was max amps reading on Turnigy Watt meter was much higher than on CA.
GCinDC
100 MW
Odd AM storm. With lightning! I waited it out tho...dbaker said:
Still plenty wet from spray when I got in.Wife's home with the kids this week (spring vaca), so I'm off dropoff/pickup duty - hence Mass Ave..
Hyena
10 GW
Yeah they are a 2.2 mohm shunt - I could have told you that and saved you the trouble :lol:GCinDC said:
I thought you must modded the stock shunt.
IIRC, for me, its' always the opposite. The CA always reads a lot higher than the WU or TWM. I wish the CA had a peak Watts, so I could directly compare that too, instead of calculating it manually (whcih still comes out way higher, IIRC)>GCinDC said:
GCinDC said:Odd AM storm. With lightning! I waited it out tho...dbaker said:
Wife's home with the kids this week (spring vaca), so I'm off dropoff/pickup duty - hence Mass Ave..
How hot is your motor when you park it at night? Are you running WOT on the way home?
GCinDC
100 MW
Am I keeping the throttle wide open when I know that it's adding no more thrust and only heating the motor with useless amps? Yeah, pretty much... But I'm not pulling 50A for more than a consecutive minute...dbaker said:
Now, I uploaded a vid first thing this morning but dang AudioSwap is taking FOREVER to put on my track.
I'm tired of waiting, and you'll just have to hear the noise. It's a couple shots from a 13 mile ride from my office , across and down the mall, passed the cherry blossoms, around hains point (passing cyclists), and thru georgetown. (And since law enforcement is a running subplot, the building on the right in the second shot is FBI HQ, a classic example of Brutalist architecture.)
[youtube]Bashw-U60Ik[/youtube]
On the last half mile home, the voltage dropped steadily from 72V to 66, so by the time I reached my garage, there was almost nothing left using the throttle. I uploaded this straight from my phone and edited it on youtube, but it's still not done, and my patience is up. So you must suffer:
[youtube]B1dpgfKzjnA[/youtube]
Anyway, now I know my max range/capacity: 9.35Ah -- the iCharger put back 37.422Ah / 4 packs.
Hey Amber, you must be right. I couldn't remember which was higher, to be honest...amberwolf said:
Now that I've got my CA calibrated, I'm going to put up another vid with it visible, to demonstrate the usage, which should be interesting since I rarely watch it, and probably very boring as well.
GCinDC
100 MW
And if you happen to notice that squeaking, it's the cheapo mechanical caliper for the read disc brake. Or, the actual pad inside vibrating... Talk about annoying, and crap design. Don't get me started... . :x
GCinDC
100 MW
0.3V? But that's just at rest! Imagine what it was under load?dbaker said:What was maximum cell imbalance at the end of that ride?
I was a dummy for not hooking my lipo buzzers on that ride!
Oh yeah, and I keep forgetting to account for my P7 light in the amps calculations...
It taps the pack directly, so the CA doesn't register any current drawn for it. The AC Charger is drawing <what?> to <still> output ~3A. Over 15 min commute, it's not much, but a number nonetheless...
GCinDC
100 MW
Balance charged last night (after that ride), and again this morning. Just hooked up lipo monitor and the delta on each 5s pack, top to bottom, is:
0.010V
0.021V
0.017V
0.064V
0.010V
0.021V
0.017V
0.064V
Ouch! Your damn very lucky and it didn't start fire when the LiPo goes dying.
Time for you get damn LVC boards from Geoff. Get Micro6 board each LiPo block (5s1p) attached.
I am serious this little board WILL SAVE YOUR BUTT! No excuse for being without LVC boards!
I have 8 lvc micro6 boards attached each 5s1p. The Micro6 is for 6s1p but YOU can use 5s1p just make sure the negative wire connect to micro6's negative as permanment using zip tie lock each other connectors.
I think I have told you way long time ago but you chose buzzer instead. Little LVC will stop letting volt goes under 3v and speaking of save your $$$ worth on LiPo battery. :lol:
Time for you get damn LVC boards from Geoff. Get Micro6 board each LiPo block (5s1p) attached.
I am serious this little board WILL SAVE YOUR BUTT! No excuse for being without LVC boards!
I have 8 lvc micro6 boards attached each 5s1p. The Micro6 is for 6s1p but YOU can use 5s1p just make sure the negative wire connect to micro6's negative as permanment using zip tie lock each other connectors.
I think I have told you way long time ago but you chose buzzer instead. Little LVC will stop letting volt goes under 3v and speaking of save your $$$ worth on LiPo battery.
:lol:
GCinDC
100 MW
I've never heard of fire starting by drained lipo.chroot said:
I killed my first lipo booster pack by over-discharging it. I ran it right down to the ground, not knowing what I was doing. I had a ping 48V and an 18.5V lipo pack and was cruising along at 66.5 and rode it down to 55V or so. I was late to pick up the kids and didn't take the time to stop. The problem was that my lipo charger hadn't worked for a cycle, so it was only half charged at best. Anyway, I felt it die under me, but kept riding, and after getting home I plugged in the charger but nothing happened. I checked the voltage on the pack: 0.00V Dead as a door nail.
My understanding is that this is how lipos die.
And that they only catch fire when:
- charged after being killed, when the polarity may have changed, or they're chemically unstable
- overcharged, those luke proved that these lipos don't catch fire until what 5V/cell?
- physical damage
My lipo buzzer is reliable for both overcharging and over discharging, but I have to plug it in for it to work...
I meant the hvc-lvc boards has the networking communicate each other if one of cell hitting 3v and it would trigger to stop the charger. I believe that you don't have Gary's HVC-LVC charger control board.
My lvc boards saved my butt twice so far when the lipo battery hit 3v. I was about arrive home. BOOM triggered and knew the lvc board triggered stop letting me goes under voltage limit.
The LiPo can start fire by overcharging, over discharging and short circuit I.E. damaged cell. You mentioned charger balance your LiPo and when it goes under 2.7v. It starts get real hot. I surprised your LiPo didnt puff or balloon when they reach dying point line.
My lvc boards saved my butt twice so far when the lipo battery hit 3v. I was about arrive home. BOOM triggered and knew the lvc board triggered stop letting me goes under voltage limit.
The LiPo can start fire by overcharging, over discharging and short circuit I.E. damaged cell. You mentioned charger balance your LiPo and when it goes under 2.7v. It starts get real hot. I surprised your LiPo didnt puff or balloon when they reach dying point line.
GCinDC
100 MW
I agree, they would have helped! But I don't need them if I use what I've got.
And yeah, if one got below 2.7V.... hmmmm...
And yeah, if one got below 2.7V.... hmmmm...
dnmun
1 PW
i don't think the lipo is at risk of catching fire if it is over discharged. my understanding is that thermal runaway only starts when the electrode is exposed to saturation or high voltage (from charging voltage too high and exceeding the storage capacity of the electrode surface) for a long enuff period of time that the surface crust on the electrode kinda cracks and this exposes fresh faces of the electrode and that is how the thermal runaway starts. we may have someone here who knows, but i don't think they would ignite from discharge.
@dnmun- I understand, Just very fortune nothing happened to Greg's LiPo.
@G- Guess what...... My Lyen controller FRIED again! I had set CA ampere limit at 15A and it apparently did not keep the lyen controller at limit as prevent damage to Mosfets or 9C motor whatever.
Look like my Lyen controller is not very reliable. I had to pedal my ebike 60lbs to get back home 2.4 miles away and NO FUN! :lol:
@G- Guess what...... My Lyen controller FRIED again! I had set CA ampere limit at 15A and it apparently did not keep the lyen controller at limit as prevent damage to Mosfets or 9C motor whatever.
Look like my Lyen controller is not very reliable.
I had to pedal my ebike 60lbs to get back home 2.4 miles away and NO FUN! :lol:
GCinDC
100 MW
Was this the REPAIRED one? or new? What was repaired last time? Do you know?chroot said:@G- Guess what...... My Lyen controller FRIED again! I had set CA ampere limit at 15A and it apparently did not keep the lyen controller at limit as prevent damage to Mosfets or 9C motor whatever.
Yes, Edward Lyen personally repaired my controller last 2 weeks ago and I didn't had chance ride due stupid RAINY whole week and weekend.
I only used my ebike 3 times during beautiful day for short time then rainy (last wednesday, saturday and today). That's it. The Controller fried.
I only used my ebike 3 times during beautiful day for short time then rainy (last wednesday, saturday and today). That's it. The Controller fried.
ronnieb52
100 W
Hoping those disc brakes aren't Avid's ...
